JPS60168825A - Surface chipping work of foundation concrete - Google Patents

Abstract

PURPOSE:To facilitate chipping concrete by a method in which when concrete for the foundation of a machinery is placed, a thin steel plate is inserted into the range to be chipped, and after the concrete hardens, the chipping portion is cut off from the sideward direction. CONSTITUTION:When concrete for the foundation 1 of a machinery is placed, a thin steel plate 4 of a width of about 50mm. is inserted in a form of angular frame of a 100mm.X100mm. size for example into the concrete not hardened. After the concrete hardens, the chipping portion 3 is cut off from the sideward direction, whereupon the sideward joints of the concrete become separated from each other by the thin steel plate 4, and concrete blocks of a size such as is divided by the thin steel plate 4 are separated. In virtue of chipping the concrete, the thin steel plate 4 can have a function of promoting separation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The unexploded 1st man is placed on the foundation concrete for, for example, mechanical excavation. Regarding the cutting method.

[Prior art]

The foundation concrete 1 is used for reasons such as mechanical excavation (=J-height adjustment rP) or use of high-quality concrete as a pad installation surface to avoid surface defects.
・After hardening, a certain area of the surface layer is often scraped away to expose the internal concrete.

Conventionally, when grinding the surface of foundation concrete like this, the necessary parts are simply scraped off little by little with a grinding tool, but it is not easy to scrape concrete that is a lump where the entire surface layer is uniformly bonded. It is inefficient and takes a long time to complete the work.

[Purpose of the invention]

The present invention was developed in view of the above circumstances, and an object of the present invention is to provide a method for surface scraping of foundation concrete, which allows for easy and efficient scraping of concrete after hardening, thereby shortening the working time. do.

[Structure of the invention]

In the basic concrete surface scraping method according to the present invention, a thin plate of any size is inserted in advance into the concrete placement rib in the depth direction over a certain range of the surface layer to be scraped,
This thin plate part is used as a part to promote concrete peeling during scraping.

That is, a non-bonded part is formed by a thin plate on the surface layer of the foundation concrete, and each time the cutting force applied to a part of the concrete 1 by a grinding tool is spread to the thin plate part, a certain range of concrete is easily peeled off. .

(Example of the invention) An embodiment of the present invention will be described below with reference to the drawings.

A plurality of vertical holes 2 are drilled in a machine foundation 1 that is a rectangular planar concrete foundation, and a predetermined depth, for example, 50 m r, is formed in the surface layer of the machine foundation 1 located around the vertical holes 2.
A cut portion 3 of n is set.

When pouring concrete for this machine foundation 1, a plate width of about 5 Qmm is placed over the area corresponding to the cut portion 3, and a steel plate of 41 mm is used.
i, 4 is inserted into a rectangular rod shape of, for example, 100 mm x 100 mm before the concrete hardens.

Then, after the concrete has hardened, if the scraped part 3 is scraped with force from the lateral direction, the Vi inserted into that part,
Since the horizontal joint of the concrete is interrupted by the &lIl plate 4, the concrete is peeled off into blocks of the size divided by the 4 thin steel plates, as shown in FIG. In other words, the cutting force of concrete is reduced by thin steel plate 4.
By extending the thin film 61 & 4 to the peeling area, the thin film 61 & 4 can function as a peeling promoting part.

According to the foundation concrete surface scraping method according to this embodiment, the work is easier than the conventional construction method in which only concrete is poured into the scraped area and the concrete is successively scraped off, and the time required for scraping is also reduced by almost half. was completed.

In particular, the cutting work itself can be carried out by simply using conventional general construction methods, and the above-mentioned effect can be achieved by inserting thin steel &4 during concrete pouring, which is extremely practical.

In the above embodiment, the thin steel plate 4 was used as the thin plate for promoting peeling, but it goes without saying that any suitable material such as a plastic plate may be used.

In addition, in the embodiment described in 0:J, a thin plate was inserted in the shape of a rod into the shaved part 3, and the concrete was subdivided into blocks. If you want to remove the material, you can insert a thin 4K to the required size and use the thin plate to form the contour of the removal. As described above, the basic concrete according to the present invention 1.
According to the surface scraping method, when concrete is poured, a thin plate of any size is placed in a certain area of the surface layer, and when the concrete is scraped off after hardening, the 7'i treated area is used as a peeling promotion area. The advantage of this is that it is easy to scrape off, can be done quickly, and reduces work time.

[Brief explanation of drawings]

The figures show one embodiment of the present invention. Fig. 4 is a perspective view of the machined foundation (foundation concrete), 3... cut portion, 4... thin steel plate. (Thin plate). Applicant Hitachi Plant Construction Co., Ltd. Figure 3 M4

Claims (1)

[Claims] (11 Concrete 1 - In the surface scraping method for basic concrete 1, which scrapes off the surface over a certain range after hardening to expose the internal concrete, thin plates of any size are removed from the surface layer during concrete installation. 1. A surface scraping method for foundation concrete, characterized in that the surface of the concrete is peeled off along the thin plate during scraping.